Furniture-tread.



' v. & s. J. VON DER LIN.

FURNITURE TREAD.

APPLICATION FILED MAR.6, 1914.

Patented Jan. 5, 1915.

' furniture supports may be adjusted to compensate for irregularities in floor surface,

VALENTINE v0 mm LiN AND SIMON J. voN DER LIN, on NEW York, Y.

runNI'rUnE-trnnm).

Specification of Letters Patent.

Patented at. 5, i915.

Application filed March 6, 191%. Serial No. 822,969.

- TouZZ whom, it may concern:

Be it known that we, VALENTINE voN DER LIN, a citizen of the United States, and SIMON J. voN DER LIN, a native of Germany, having declared his intention of becoming a citizen of the United States, both residents of the borough of Manhattan, city, county, and State of New York, have invented certain 'new and useful Improvements in Furniture- Treads, of which the following is a specification' Our present invention, like that set forth in our concurrent application, Serial No.

. l. 820,419 filed Feb. 24th, 1914., is designed to afford simple but effective means whereby &c., the distinctive feature in said concurrent application being a rotatable adjusting sleeve engaging' wvith a peripherally threaded tread, movable vertically upon, but not rotatable upon, a central guide post. Our present invention consists in the specific construction and arrangement of parts herein described and claimed,a distinguishing feature being a tread base plate formed "with an adjustable screw spindle engaging with a threaded socket iece in the furniture-leg or support, in COIlJllIlCtlOIl with a binding nut-disk on the screw spindle adapted to hold the tread base plate in a prescribed position with relation to said support, all as hereinafter fully set forth. In the accompanying drawings, Figure 1, is an .elevationof the lower part-of the leg of a table or other article to which our adjustable tread is applied; Fig. 2, a central vertical sectional elevation thereof; Fig. 3, is a side'elevation of the socket piece; Fig. 4, a top view and Fig. 5, a bottom view thereof; Fig. 6, an edge elevation of the nut disk; Fig. 7, a view of the upper or under side thereof; Fig. 8, is a side elevation of the spindle screw, tread base plate and tread; Fig. 9, a topview of the same; Fig". 10, is a side elevation of a modification in which the tread is in the form of a ball rotatably mounted in the base plate; Fig. 11,

' is a sectional elevation of a modification in which the tread is in the form of an antifriction caster roller.

In the drawings L, re resents a leg or support of any article of urniture. If this su port is metallic, or of very hard wood or 0t er suitable material, the female socket screw a. mav be tapped directly thereon, in

which case the support itself will be the adapted for insertion in a recess or mortise t, formed for its reception in the end of the support L. It may be rigidly secured in position inthe. leg L, by any appropriate means, as by screws .9, s, passing through the annular lip flange 8 as shown in Fig. 2. In either case the function of the screw socket is to afford means for engagement with the screw post or spindle Z), attached to the tread base B,to which the tread T, is in turn attached.

The base plate B, is integral with the spindle screw 6, and afl'ords a convenient means of turning the latter on its longitudinal axis to effect the vertical'adjustment of the tread T, whether the tread is rigid thereon and incapable of independent movement as in Figs. 1, 2 and 8; in the form of a ball rotatable in a socket in the under side of the base as in Fig. 10; or where the tread is in the form of a caster roller as in Fig. 11, in which lattercase the caster plate C, in which the wheel tread T, is mounted is pivotally secured to the lower end of the tread base plate B, in such manner as to'be rotatable thereon to allow the caster wheel tread T, to adapt itself in travel to the line of least resistance, or in other words to conform to the line of motion. In this latter case the usual anti-friction rollers 0, may be interposed between the under side of the base plate B, and the ulpper side of the bearing plate C, on which t e tread roller T, is mounted.

In order to lockthe parts positively in prescribed positions with relation to each other, as after an adjustment to conditions and requirements' has been effected by positioning the screw post 6, vertically within the socket member S, we provide a lock-nut-disk D, upon the screw spindle, b, between said socket member S, and the tread base plate B. This disk nut D, is preferably of a diameter sufficient to protrude slightly beyond the lower edge of the leg or support L, so as to be conveniently accessible for the fingers; and its central portion (1, may be of greater thickness than the peripheral portion of the disk D, to afford ample screw connection with the screw spindle b, and also to afford a contact bearing with the socket flange 5 when screwed home against the latter to lock the spindle b, in a desired position against longitudinal movement in either direction.

The operation of our device will be readily understood. If it is desired to adjust the tread T, either up ordown as related to the support L, and the floor or other surface against which the tread is designed to rest, the disk nut D, is turned down away from the socket member S, and the screw spindle turned either up or down according to the adjustment required, the base plate B, being used as a finger piece. When the tread T, contacts properly with the floor or other supporting surface, the disk-nut D, is again jammed up against the socket piece S, thereby locking the parts in the new and desired relationship. I

It will be seen that this construction and arrangement of parts is very simple and inexpensive; that there are no parts protruding beyond the tread base plate; and that the use of a wrench or extraneous tool is dispensed with in effecting the adjustment I of the parts.

As in our concurrent application hereinbefore referred to we use the term tread in a general sense, meaning any floor or surface contacting means attached to the tread base plate B. With this understanding What we claim as our invention and desire to secure by Letters Patent is,

1. The furniture tread herein described spindle and upon the opposite side means for securing a tread, a threaded socket piece having an annular lip flange with means for securing it 'to the leg, a tread carried by said base, and a lock-nut disk into which said spindle is screw-threaded, said disk being interposed between said flange and the.

base and having its peripheral portion reduced in thickness and protruding slightly beyond the lower edge of the leg for con venience of manipulation.

VALENTINE VON nnn LIN. SIMON J. VON DER LIN. Witnesses:

Gno. WM. MIATT, DOROTHY MIATT. 

